<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <!-- 表头 -->
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <!-- 表格 -->
      <div class="cart-body">
        <ul class="cart-list" v-for="cart in cartInfoList" :key="cart.id">
          <li class="cart-list-con1">
            <input
              type="checkbox"
              name="chk_list"
              :checked="cart.isChecked === 1"
              @change="updateChecked(cart, $event)"
            />
          </li>
          <li class="cart-list-con2">
            <img :src="cart.imgUrl" />
            <div class="item-msg">{{ cart.skuName }}</div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{ cart.skuPrice }}.00</span>
          </li>
          <li class="cart-list-con5">
            <a
              href="javascript:void(0)"
              class="mins"
              @click="changeNum('sub', -1, cart)"
              >-</a
            >
            <input
              autocomplete="off"
              type="text"
              :value="cart.skuNum"
              minnum="1"
              class="itxt"
              @change="changeNum('change', $event.target.value * 1, cart)"
            />
            <a
              href="javascript:void(0)"
              class="plus"
              @click="changeNum('add', 1, cart)"
              >+</a
            >
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{ cart.skuNum * cart.skuPrice }}</span>
          </li>
          <li class="cart-list-con7">
            <a href="#none" class="sindelet" @click="handleDelete(cart)"
              >删除</a
            >
            <br />
            <a href="#none">移到收藏</a>
          </li>
        </ul>
      </div>
    </div>
    <!-- 结算 -->
    <div class="cart-tool">
      <div class="select-all">
        <input
          class="chooseAll"
          type="checkbox"
          :checked="isCheckedAll && cartInfoList.length > 0"
          @change="updateAllIsChecked"
        />
        <span>全选</span>
      </div>
      <div class="option">
        <a href="#none" @click="deleteAllCheckedCart">删除选中的商品</a>
        <a href="#none">移到我的关注</a>
        <a href="#none">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">已选择 <span>0</span>件商品</div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{ totalPrice }}</i>
        </div>
        <div class="sumbtn">
          <a class="sum-btn" @click="goTrade">结算</a>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import throttle from 'lodash/throttle'
import { mapActions, mapGetters } from 'vuex'
export default {
  name: 'ShopCart',
  created () {
    this.getData()
  },
  computed: {
    ...mapGetters('shopCart', ['cartList']),
    // 购物车数据
    cartInfoList () {
      return this.cartList.cartInfoList || []
    },
    totalPrice () {
      return this.cartInfoList.reduce((acc, item, index) => {
        if (item.isChecked === 1) {
          return acc + item.skuPrice * item.skuNum
        }
      }, 0)
    },
    // 是否全选
    isCheckedAll () {
      return this.cartInfoList.every((item) => {
        return item.isChecked === 1
      })
    }
  },
  methods: {
    ...mapActions('shopCart', [
      'getCartList',
      'deleteCartById',
      'updateType',
      'deleteAllChecked',
      'updateAllChecked'
    ]),
    ...mapActions('detail', ['addOrUpdateShopCart']),
    getData () {
      this.getCartList()
    },
    // 截留修改商品的数量
    changeNum: throttle(async function (type, value, initData) {
      if (type === 'sub') {
        value = initData.skuNum > 1 ? -1 : 0
      }
      if (type === 'change') {
        if (isNaN(value) || value < 1) {
          value = 0
        } else {
          value = parseInt(value) - initData.skuNum
        }
      }
      await this.addOrUpdateShopCart({ skuId: initData.skuId, skuNum: value })
      this.getData()
    }, 1000),
    // 删除产品
    async handleDelete (cart) {
      try {
        await this.deleteCartById(cart.skuId)
        this.getData()
      } catch (error) {}
    },
    // 修改购物车商品选中状态
    async updateChecked (cart, event) {
      try {
        const isChecked = event.target.checked ? '1' : '0'
        await this.updateType({ skuId: cart.skuId, isChecked })
        this.getData()
      } catch (error) {}
    },
    // 删除购物车选中的商品
    async deleteAllCheckedCart () {
      try {
        // 派发actions
        await this.deleteAllChecked()
        this.getData()
      } catch (error) {}
    },
    // 是否全选
    async updateAllIsChecked (e) {
      try {
        const checked = e.target.checked ? '1' : '0'
        await this.updateAllChecked(checked)
        this.getData()
      } catch (error) {}
    },
    // 结算
    goTrade(){
      this.$router.push('/trade')
    }
  }
}
</script>

<style lang="less" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;

  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }

  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;

      & > div {
        float: left;
      }

      .cart-th1 {
        width: 25%;

        input {
          vertical-align: middle;
        }

        span {
          vertical-align: middle;
        }
      }

      .cart-th2 {
        width: 25%;
      }

      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;
      }
    }

    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;

      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;

        & > li {
          float: left;
        }

        .cart-list-con1 {
          width: 4.1667%;
        }

        .cart-list-con2 {
          width: 25%;

          img {
            width: 82px;
            height: 82px;
            float: left;
          }

          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }

        .cart-list-con3 {
          width: 20.8333%;

          .item-txt {
            text-align: center;
          }
        }

        .cart-list-con4 {
          width: 12.5%;
        }

        .cart-list-con5 {
          width: 12.5%;

          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }

          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 33px;
            float: left;
            text-align: center;
            font-size: 14px;
          }

          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
        }

        .cart-list-con6 {
          width: 12.5%;

          .sum {
            font-size: 16px;
          }
        }

        .cart-list-con7 {
          width: 12.5%;

          a {
            color: #666;
          }
        }
      }
    }
  }

  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;
    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;

      span {
        vertical-align: middle;
      }

      input {
        vertical-align: middle;
      }
    }

    .option {
      padding: 10px;
      overflow: hidden;
      float: left;

      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }

    .money-box {
      float: right;

      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }

      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;

        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }

      .sumbtn {
        float: right;

        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: 'Microsoft YaHei';
          background: #e1251b;
          overflow: hidden;
        }
      }
    }
  }
}
</style>
